US 69 Bridge Over the Missouri River

April 24th, 2015

Location: Kansas City, Missouri and Kansas
Client: Burns & McDonnell
Owner: Missouri Department of Transportation
Services: Geotechnical, Drilling

Geotechnology provided geotechnical consulting and environmental drilling services for the procurement phase of the design-build project. Geotechnology’s scope of services included performing a subsurface exploration, laboratory testing, and preparation of a geotechnical data report characterizing the site for use by the designbuild teams.

Geotechnology conducted site reconnaissance; obtained site access for the drill rigs and barge; coordinated and conducted geotechnical drilling and sampling for five land borings and two river borings, and conducted environmental drilling and sampling for nine land borings.

Highway 47 Bridge Over the Missouri River

April 24th, 2015

Location: Washington, Missouri
Client: HDR Engineering, Inc.
Owner: Missouri Department of Transportation
Services: Drilling, Geotechnical

Geotechnology provided geotechnical services for the design of a new bridge immediately upstream of the existing bridge in accordance with the “Adjacent Upstream Alternative” from the Environmental Assessment. The bridge was designed using LRFD methodology. The geotechnical scope of services assumed a 9-span bridge located parallel and to the west of the existing bridge. It also assumed a mechanically stabilized earth wall would be necessary at the south end bent, and a planned approach embankment north of Bent 1 that is anticipated to be approximately 20-25 feet high and extend 500-600 feet in length. Drilling included land and river borings for the proposed bridge, mse wall, the north approach embankment, and the approach pavement on both sides of the river.

The Route 47 Missouri Bridge needs to be replaced because of its deteriorating condition as it is a vital link for the community. About 11,000 vehicles travel over the bridge each day. A new bridge will improve safety, improve reliability and contribute to the continued growth in the area.

The proposed new bridge would provide safer and more efficient travel for many motorists traveling between Franklin and Warren Counties.

Daniel Boone Replacement Bridge

April 24th, 2015

Location: St. Louis and St. Charles Counties, Missouri
Client: Walsh-Alberici Joint Venture
Owner: Missouri Department of Transportation
Services: Drilling, Deep Foundation Testing, Geotechnical, Non-destructive testing

The original continuous truss bridge opened in 1932 to accommodate both east and westbound traffic when the population of St. Charles County was roughly 25,000. In 1989 in an effort to accommodate increased population and vehicular traffic the original bridge was converted to two-lanes of westbound traffic only while a new continuous truss 2-lane bridge was opened to handle eastbound traffic. Additional modifications to the new eastbound bridge were then made in 2001 narrowing the lanes and removing shoulders to allow for three lanes of traffic eastbound.

From the 1980’s through the 2000’s, St. Charles County has been ranked among the fastest-growing counties in the nation and the congestion along the I-64/40 corridor between St. Charles County and St. Louis County made it abundantly clear that additional measures would have to be made to accommodate the populous.

A new girder bridge was designed in 2004 and funding was unveiled in 2011, construction for the project began
in 2013 and is scheduled for completion in 2015.

Geotechnology performed drilling and testing for foundation inspection holes within the footprint of each drilled shaft to confirm rock quality below the bearing surface of each drilled pier. Crews drilled through more than 100 feet of alluvial deposits consisting of clays, silts, sand and cobbles. Overwater drilling was performed by utilizing a skid mounted drill rig on a barge to core down to between 80 – 112 feet below the working platform. These significant lengths of unsupported casings caused bowing and twisting which added another layer of complexity to the project. Land borings were performed using truck mounted rigs owned by Geotechnology, Inc.

By the end of this portion of the project, 42 foundation inspection holes consisting of 1,950 feet of rotary drilling and 903 feet of NQ2 rock coring were completed without accident or injury.

St. Louis Arch Grounds – City+Arch+River

January 15th, 2015

Client/Owner: National Park Services CityArchRiver 2015 Foundation
Location: St. Louis, Missouri
Services: Drilling, Geotechnical, Special Inspections

In fall 2010, Michael Van Valkenburgh & Associates (MVVA) won The City+The Arch+The River 2015 International Design Competition to develop a new concept for the Jefferson National Expansion Memorial (JNEM) commonly known as the St. Louis Gateway Arch Grounds. Elements of the new design for the grounds include expanding the Arch Museum and adding a major new entry facing Memorial Drive; creating a beer garden/restaurant that converts to an ice skating rink in the center; an urban ecology center; a wetland/bird sanctuary, a cobblestone walkway and three new parking garages. Final design and construction is to commence by 2015, the 50th anniversary of the completion of the Gateway Arch.

In 2012, Geotechnology provided subsurface exploration and engineering recommendations for the Park Over the Highway portion of the project which includes the landscaped bridge and replacement bridge over the depressed section of I-70. In coordination with MoDOT and the City of St. Louis special traffic control procedures were used and drilling was performed at night when there was less commuter traffic. Difficulties during drilling included working around the Cardinal’s Post-season games, numerous utilities rubble fill and varying rock quality. In addition, Memorial Drive was required to be open by 5:00 a.m. each morning. The structure was designed with minimal impact to the existing retaining walls (i.e. foundations were installed behind the walls). Special hybrid drilled shafts were also designed to expedite construction and reduce vibrations on neighboring structures (predominately the Old Cathedral).

Geotechnology provided a Phase I Environmental Site Assessment, a geotechnical desk study, and an archaeological desk study. The purpose of these services was to identify potential ground hazards and corresponding primary risks at an early stage so that these risks could be better managed during the design and construction processes. The geotechnical report addressed deep foundation excavation and shoring considerations, impacts of soil types, obstructions and environmentally impacted material on site grading, structural foundations considerations, and groundwater related considerations. The purpose of the Phase I ESA is to provide a professional opinion as to the potential for Recognized Environmental Conditions (RECs) to exist on the site, particularly hazardous substances or petroleum products on the property or that may have been released onto the property, the subsurface or surface waters in the past.

Geotechnology also provided utility locating services and detailed geotechnical exploration for the new visitors center, regraded slope over TRRA rail tunnel down to the Leonore K. Sullivan Boulevard, and new Rangers Station. Geotechnology provided specialist sampling and analysis services for soils nutrient assessment.

MoDOT New I-64 Seismic Retrofit

June 18th, 2013

Owner/Client: Missouri Department of Transportation (MoDOT)
Location: St. Louis, Missouri
Services: Subsurface Utility Engineering

Geotechnology provided Subsurface Utility Engineering (SUE) services for MoDOT District 6 in support of the seismic retrofit of Interstate Highway 64 from 11th to 7th Streets and 22nd and 21st streets in downtown St. Louis.  SUE  Quality Level D through A services were performed in advance of retrofitting 47 piers for compliance with new seismic requirements.

Electromagnetics, Radiofrequency, and Ground Penetrating Radar (GPR) were used to trace the locations of utilities.  Utility locations were designated, surveyed by the project surveyor, and recorded on final drawings. Geotechnology provided Quality Level A vacuum excavation services as described in ASCE Guidance 38-02.

Additional services provided for this project included drilling, materials testing and sonic logging.

Illinois Department of Transportation (IDOT)

June 18th, 2013

Owner: Illinois Department of Transportation (IDOT)
Client: Various
Location: Various locations throughout Southwestern Illinois
Services: Geotechnical, Geophysics, Drilling, Environmental, Construction Materials Testing, Soils & Materials Testing

Geotechnology, Inc. has provided geotechnical engineering, drilling, geophysics, construction observation and materials testing, and environmental engineering services on a significant number of road and bridge projects. Services have included:

  • Drilling, sampling, laboratory testing, and engineering analyses to develop foundation and site design parameters for proposed roadway alignments, new and existing bridge structures, renovation and repair of existing pavements, new asphalt and concrete pavements, and seismic retrofit evaluations of existing bridge structures.
  • Subsurface Utility Engineering Quality Levels D, C, B and A including record searches, site reconnaissance, geophysical surveys, and vacuum excavation (a drilling technique using high pressure air and vacuum to remove soil without harming subsurface structures), all combined with land surveying, and GIS to produce a final map depicting locations of identified utilities.
  • Geophysical surveys and analyses related to proposed roadway alignment geology, structural condition of existing bridge support systems, bridge subsidence investigations and analyses, and investigation of pavement subgrade systems.
  • Materials testing services for new and existing asphalt and concrete pavement, including concrete and asphaltic concrete mix design; Superpave mix design, verification of aggregate quality and compaction testing; slump and air content testing; compressive strength testing of samples; flexural strength testing of beams and structural components; testing of welded and bolted connections; foundation construction observation and testing, including Pile Dynamic Analyses™ (PDA) testing of steel H-piles, Pile Integrity testing of cast-in-place augercast piles, static load tests to determine actual load stresses and/or coordinate PDA test results; cross-hole sonic logging, TV camera inspections, and contract drilling of drilled shafts; and developing temperature models to predict temperature variations on main bridge cast-in-place elements in order to control cracking.
  • Environmental assessments, asbestos surveys, and underground storage tank management related to proposed roadway alignments.

Geotechnology, Inc. has provided these and related services for numerous municipalities, cities and counties, as well as for State agencies and the Federal Highway Administration interstate highway system. This includes projects in the Illinois counties of St. Clair and Madison in the Metro East St. Louis area.

A sampling of projects performed for IDOT include:

IDOT New Mississippi River Bridge & Approach Ramps

June 18th, 2013

Owner: Illinois Department of Transportation (IDOT) – District 8
Location: East St. Louis, Illinois
Services: Subsurface Utility Engineering (SUE),

Geotechnology was awarded a 24-month subsurface utilities engineering (SUE) contract for various routes in various counties through the Illinois Department of Transportation (IDOT) Region 5, District 8 as a result of a qualifications based procurement.

In June 2008, the first SUE work order under this contract was issued. The task is related to the design and construction of the New Mississippi River Bridge (MRB) approach ramps from Route 3 to the river. Geotechnology performed SUE quality levels D, C and B services within a 400-foot wide right-of-way area from the Mississippi River to 300 feet east of Route 3, approximately 3,200 feet. Geotechnology and its subconsultant Engineering Design Source, Inc. obtained and researched records from various utility companies, located and surveyed visible features and designated locations of underground utilities through use of geophysical surveying.

Based on the SUE Quality level B information obtained and after review by IDOT and the MRB design team, Quality Level A information was obtained at 22 selected utility sites. Potholing to verify the underground utility and determine its size and depth was performed using Geotechnology’s air knife and crews.

IDOT Pontoon Road, High Speed Rail Grade Separation

June 18th, 2013

Owner/Client: Illinois Department of Transportation (IDOT)
Location: Granite City, Illinois
Services: Geotechnical, Construction Materials Testing

Geotechnology provided geotechnical and construction observation services for preliminary and final design phases for single- and multi-span bridges that provide a grade separation at Nameoki Road and a four-rail, at-grade crossing in Granite City, Illinois.

The high-speed rail grade-crossing project included design and construction to replace a four-rail, at-grade crossing with a grade separation that includes a single-span bridge carrying Pontoon Road over Nameoki Road to meet the elevation of a multi-span bridge over the rails. One of the four rails carries Amtrak and will include the St. Louis to Chicago high speed rail tracks.

Bridge foundations are supported on end-bearing H-piles. Mechanically-stabilized earth (MSE) walls support both sides of the approach embankment east of the single-span bridge and between the single and multi-span bridges. Special concern from a geotechnical vantage was the soft soil conditions in the embankment and MSE retaining wall foundation areas. Recommendations addressing soft subgrade soil conditions included:

  • A geogrid-reinforced aggregate mat below the east approach embankment and between Nameoki Road and the railroad tracks
  • Wick drains
  • Partial removal and replacement of soft subgrade soil
  • Staged construction under various portions of approach embankments

Services during construction included vibration monitoring during pile and sheet pile driving, and fill control and field density measurements during embankment placement. Pre-construction services included environmental surveys on properties that were purchased during right-of-way acquisition and asbestos surveys of 50 residences and commercial structures that were demolished.

MoDOT I-470 & Pryor Road Interchange

June 18th, 2013

Owner: Missouri Department of Transportation (MoDOT) – District 4
Client: Pyramid Contractors, Inc.
Location: Lee’s Summit, Missouri
Services: Drilling, Non-Destructive Testing

The interchange project includes the remediation of the abandoned limestone mines from the old Union Quarries located next to the I-470 right of way near the proposed Pryor Road interchange in Lee’s Summit, Missouri. Room and Pillar mining occurred at this site between 1965 and 1981. In addition, two sets of tunnels were advanced under what is now I-470. During the surveying phase of the project in 2006, MoDOT personnel observed several “dome-outs” within or near the project site. Dome-outs occur where the bedrock roof above a mine fails. Progressive failure of the roof results in subsidence features visible at the ground surface. It was reported that the mined areas have experienced numerous subsurface roof failures and surface subsidence since the mine closure.

Geotechnology developed the technical requirements for the mine remediation, which included determining which portions of the mine had to be filled, what materials to use and the testing requirements. Project specifications developed by Geotechnology included materials properties, injection location, injection limits and verification requirements for remediation of the mine on this project site that is adjacent to an active interstate highway. Geotechnology also developed the remediation project estimate and construction schedule and investigated alternative solutions for mine remediation and selected the use of low-strength fly ash grout for infill and barrier walls.

Geotechnology was also available to provide consultation as requested during construction.

MoDOT I-70 Connector for New Mississippi River Bridge

June 18th, 2013

Owner: Missouri Department of Transportation (MoDOT)
Client: Crawford, Murphy, & Tilly, Inc.
Location: St. Louis, Missouri
Services: Environmental

Geotechnology provided environmental consulting, sampling and testing to support the design and construction of the I-70 Missouri Connector and Main Span Corridor project related to the New I-70 Mississippi River Bridge. The four-lane, cable-stayed main span, located south of the McKinley Bridge and about a mile north of the Martin Luther King Bridge will connect the City of St. Louis to the Metro East area of Illinois.

To assist the design team in evaluating the historically urban, industrial area, Phase II Environmental Site Assessments were needed to prepare for construction. The project area included properties both west of Broadway (MoDOT Connector) and east of Broadway (Main Span Corridor). The Assessment identified existing and prior site uses including a prison work release center, railroad track, storage for rubble collected from building demolition throughout the city, cement storage and packing, mattress factory, scrap metal and rubber warehouse, warehouse, railroad tie storage, gasoline filling station, and furniture frame manufacturing company.

The scope of services included reviewing the environmental assessment reports prepared by others, and sampling and testing in conjunction with the geotechnical investigation where impacted soil and/or groundwater were suspected or encountered. Thirty environmental borings were advanced, samples extracted and tested for a suite of parameters including volatile organic compounds, metals and PCBs. Monitoring wells were also installed in borings where water was encountered, and groundwater was later sampled and tested for contamination. All field activities were conducted according to the Missouri Department of Natural Resources (MDNR) regulations and testing was in accordance with MDNR Missouri Risk-Based Corrective Action (MRBCA) guidelines.